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水稻穗粒数相关基因的初步定位

DOI: 10.3969/j.issn.1000-7091.2013.03.004, PP. 19-27

Keywords: 水稻,穗长,着粒密度,穗粒数,QTL

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Abstract:

利用穗粒数和穗长差异较大的2个粳稻品种日本晴与大穗型粳稻种质B0801组配群体,对水稻穗粒数、穗长和着粒密度等穗部性状进行数量基因位点检测,共检测到11个QTL,分布于第1,2,5,7以及9号染色体上,QTL的贡献率范围为0.21%~68.20%。其中,4个控制穗粒数的QTL分别位于第1,2,7,9号染色体,其贡献率为0.21%~25.06%。第9号染色体RM1328~RM3533标记区间的控制穗粒数性状的qGNP9-1位点,为主效QTL;控制穗长的QTL4个,4个QTL分别位于第1,2,5,9号染色体。其贡献率范围为0.28%~61.19%,其中qPL9-1的LOD值为31.88,对表型变异的贡献率为68.19%,为主效QTL。控制着粒密度的QTL3个,位于第1,2,9号染色体,其贡献率为0.43%~6.91%。qSD1-1增效等位基因来自大穗亲本,基因作用方式为加性。

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